Qt Super-Macros

A set of one-line C++ macros to simplify the creation of reccurent things (like Qt Meta Properties) so that doing them in C++ is not harder than in QML, and requires no boilerplate glue-code.

For one-line creation of QML properties

• W_***_PROPERTY : a macro that takes a type and a name, and creates automatically the member attribute, the public getter and setter, and the Qt signal for notifier, and allow use in QML by exposing a read/write Q_PROPERTY.

• R_***_PROPERTY : another macro that does almost the same as QML_WRITABLE_PROPERTY except that the property is not modifiable from the QML side, only C++ can access the setter.

• C_***_PROPERTY : a simplified version of the previous macros, that exposes a constant property with no getter and no setter, from C++ or QML side.

The *** can be either ``, PTR, `CREF`, or `AUTO`. The three first are simple macros that you use by simply passing the non-qualified type (`T`) and it'll add the qualifiers for var (none), pointer (``), or constant-reference (`const &`) where needed. The last one in the other hand, uses either `T` or `T` and it's capable of adding constant-reference by deciding itself which type is the cheapest (using some template trickery internally).

INFO : by default, getters are named get_<property name>, but if you want more Qt-compliant naming (no prefix) you can set the QTQMLTRICKS_NO_PREFIX_ON_GETTERS flag in QMake.

For easier QQmlListProperty from QList

• QML_LIST_PROPERTY : a really handy macro to create a QML list property that maps to an internal QList of objects, without having to declare and implement all static function pointers...

For simple enum class that can be used in C++ and QML

• QML_ENUM_CLASS : a macro to declare a QObject class that only contains a Q_ENUM and can be exposed as is to QML.